<template>
  <div class="my-tab-bar">
    <!-- 遍历数组
     动态添加class
     绑定点击事件 把当前对象 和索引当实参 传给 btn（）函数-->
  	<div class="tab-item" v-for="(obj,index) in arr" :key="index"
    @click="btn(index,obj)"
    
    :class="{current:index===i}">

      <!-- 图标 -->
      <span class="iconfont" :class="obj.iconText"></span>
      <!-- 文字 -->
      <span>{{obj.text}}</span>
    </div>
  </div>
</template>

<script>
export default {
  data(){
    return{
       i: 0
    }
  },
  props:{
   arr:{
      type:Array,
    require:true,
   },
    // 自定义校验规则
    valdator(val){
      if(val.length >=2&&val.length<=5){
        return true
      } else{
        console.error("数据源必须在2-5项");
        return false
      }
    }
  },
  methods:{
    btn(index ,theObj){
      this.i=index //点谁谁亮
      this.$emit("changeCom",theObj.componentName) 
      // 要切换的组件名传给App.vue
    }
  }
}
</script>

<style lang="less" scoped>
.my-tab-bar {
  position: fixed;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 50px;
  border-top: 1px solid #ccc;
  display: flex;
  justify-content: space-around;
  align-items: center;
  background-color: white;
  .tab-item {
    display: flex;
    flex-direction: column;
    align-items: center;
  }
}
    
.current {
  color: #1d7bff;
}
</style>